Cooking-stove



C. P. GEISSENHAINER.

Cooking Stove.

Patented July 9,V 1861.

f77/0670507' A {f4/@9% UNITED STATES' PATFNP FFEQF.

@HABILES P. GEISSENHAINER, OF PITTSBURG, PENNSYLVANIA.

COOKING-STOVE.

Speccation forming; part of Letters Patent No. 32,764, dated July 9, 1861; Ressued February 7, 1871, No. 4,254.

To all whom it may concern:

Be it known that l, CHARLES P. GnissnN- namen, of Pittsburg, in the county of Alleghcny and State of Pennsylvania, have invented a new and useful improvement in Cooking-Stoves; and do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawing', forming part of this specification, in whiche- Figure l, is a longitudinal section in perspective, of my improved cooking stove, with the top plate removed. Fig. 2, is a representation of my improved stove. Fig. t is a section of the door and part of the front plate of the stove showing the flange and opening for catching the smoke &e. Fig. 3, is a representation of the boiler detached from the stove.

'ln the several figures like letters of refrrence designate the same parts.

My invention consists in an improved construction and arrangement of the air passage and lines, whereby heated air is more etiiciently applied to increase the heat and produce more perfect combustion of the smoke and products of the combustion of the fuel. Also in a peculiar construction of the door of the lire chamber to prevent the escape of gas or smoke from the tire into the room; and also the mode of attaching the water boiler to the cooking stove.

llo enable others skilled in the art to construct and use my improved cooking stove, l will proceed to describe it more fully.

in the drawing, Fig. l, represents the eX- tcrior shape and appearance of my cooking stove. lt is of rect-angular shape, and the opposite sides are parallel. Back of the irc chamber c is the oven which occupies the central portion of t-he stove, the cavity forming the oven extending from one side to the other of the stove, and having doors c opening into it in both of the sides of the stove, so that the stove may be used with either side out from the wall. The top, bottom and rear end plates of the oven are situate a sutlicient distance from the outer plates of the cooking stove to form a flue f, f on three sides of the oven, as seen in Fig. l, and the hot air flue c at the front end of the oven, is situate between it and the back wall of the tire chamber. The lire chamber a. is situate as usual in the front portion of the stove, and extends from side to side.

The back plate of the fire chamber, extends up a little above the top plate of the oven, and is curved over the outer front edge of the oven at g, (see Fig. l.) so as to leave a long narrow aperture for the admission of hot air from the flue c, and has also a row of small holes z' z' near the top, opening in the opposite direction into the tire chamber. Around the top plate of the oven, is a continuation of the hot air flue, (marked e) which is close to the outer plates of the stove on two sides, but at the rear end of the oven, has a longitudinal opening into the smoke flue f. The two side portions c of the hot air flue, are perforated with holes t, as seen in Fig. l, opening into the upper horizontal flue f, which is the space between the top of the stove, and the top of the oven. The top plate 7L has the usual pot holes, two of which in front, open over the lire chamber, and the others open into the iiue or space between the top plate and the oven. The grate of the fire chamber is open below the top of the grate bars, and is closed above, by a hinged door which is seen open in Fig. l, and closed in Fig. 2.

Back of and below the back plate of the tire chamber, and nearly parallel to it, is an. iron plate Z, which is so placed, as to form an air flue e which opens to the air,.under neath the hearth of the cooking stove, as seen in Fig. l; the rear end of the plate Z rests against the front plate of the oven, so that the wall of the oven forms part of the flue c. Underneath the plate Z the bot-- tom plate mof the cooking stove curves doi'vnward, in front of the oven, so as to form an enlargement of the smoke flue and forming a horizontal flue n extending' transversely across and underneath the stove at its front end, through which the products of combustion escape from the stove into a chimney, it being designed to place my stove with its side, instead of its rear end, toward the chimney, which saves room, and is more convenient in cooking. The horizontal flue a is closed at one end by a cap t which fits on either end of the flue n so that either side of the stove may be turned toward the chimney at pleasure, thus making it, a right and left hand cooking stove.

To my stove I attach a cast iron boiler p which may, if preferred, be cast in one piece with the stove. l place it either at the rear end, or at the one side of the cooking stove as may be preferred. If placed at the end, I make it of less than the usual width, and as broad as the stove, so as to receive the heat from the rear flue f. If it is preferred to place the boiler near the front of the stove, I place it at one side, so that the horizontal flue n will pass either under it 'or through it, in which latter case I make an opening g (see Fig. 8) through the lower part of the boiler, which forms a continuation of the flue n. As however the heat of the air and products of combustion, are greater in the vertical ilue f, than in the horizontal Hue n, and as the whole of one side of the boiler, when placed at the rear end of the stove forms one wall of the flue. I prefer to place it in that position.

The cooking stove, being constructed as described, when a bituminous coal fire is kindled in the grate, the upper part of the air flue e becomes heated, which causes a current of air to pass in at the mouth of the flue under the hearth; and as the flue c Vis contracted at the top, the air rushes through the longitudinal opening at the upper front edge of the oven, into the space over the top of the oven, as shown by the arrow at that point in Fig. l, and also passes through the small holes z' z'. The heated air also passes around the channel or Hue e on top of the oven, and escapes through the holes along the Hue, and also through the longitudinal opening into the vertical flue f at the rear end of the oven. As a great deal of smoke and gas pass off from a bituminous coal tire, unconsumed, the mixture therewith of jets of heated air, at the various holes in the horizontal flue e causes the combustion of this inflammable gas and carbon and the creation of llame and a'great augmentation of heat in the space over the oven, and in the flue f, thus increasing greatly the eiiciency of the stove, and saving a large amount of fuel, which would otherwise pass off unconsumed, and would choke the lues by depositing soot. A great saving of heat is also secured by placing the flue n through which the smoke and heated air pass off from the stove into the chimney, under the air flue e so that the air entering the Hue c is heated thereby as well as by passing in the rear of the fire chamn ber cz.

Another improvement in my cooking stove consists in a peculiar construction of the door 7c by which the opening into the fire chamber is closed. The door is hinged to the front plate of the stove, in the ordinary way, by a pivot projecting from it on either side, which enters projecting bearings r in the front plate of the stove. The bottom of the door, I extend beyond the line of the axis at these pivots, by a curved projection s which, when the door is closed (as in Fig. 2) projects outward from the grate bars, leaving an opening all along the top grate bar, into the lire chamber as seen in section in Fig. 4. The object of this, is to prevent any smoke or gas, which may escape from the grate bars below the door, from passing into the room. vWhen, as Jfrequently occurs, a puff of gas or smoke escapes from the bars, it is arrested by the projecting flange s and is drawn into the lire chamber through the aperture below the door, through which there will be a strong draft.

Having thus described my improvement in cooking stoves, I do not claim the use of a flue for the passage of air into the smoke flue, back of the lire chamber, but

What I do claim and desire to secure by Letters Patent isl. The arrangement, in cooking stoves, of an air flue opening under the hearth, for introducing air in the rear of the tire basket, in such relation to the flue for the exit of the smoke and products of combustion, as hereinbefore described, that is to say placing the horizontal smoke iue in the front part ot the stove, and immediately under the air l'lue, for the purpose of increasing the heat of the air as it enters the stove through the flue under the hearth, by extracting the waste heat from the smoke and products of combustion before they escape from the stove.

Q. Constructing the door to the lire chamber of cooking stoves, with a flange projecting from its lower edge, so situate in relatien to the hinge, as that when the door is closed a space shall be left between the projecting flange and the grate bars, to catch and return to the fire any smoke or gas, that would otherwise escape into the room, substantially as hereinbefore described.

In testimony whereof I, the said CHARLES I). GEISSENHAINER have hereunto set my hand.

CHARLES P. GEISSENHAINER. lVitnesses JAMES D. MAHoN, M. G. CUSHING. 

